Results 61 to 70 of about 1,178,019 (215)

Statistical Analysis of Atmospheric Ducts in the Yellow and Bohai Seas of China and Study of Their Electromagnetic Wave Propagation Characteristics

Atmosphere
Atmospheric ducts play a critical role in the propagation of electromagnetic waves by minimizing signal loss and extending transmission distances, which is essential for radar, communication, and navigation systems.
Xiao Yang, Lei Li, Leke Lin, Rui Zhang, Shuaishuai Liang, Zhenwei Zhao   +5 more
doaj   +1 more source

Decadal‐scale drivers of South Pacific hydroclimate variability

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Using prescribed SST perturbations in the IGCM4 model, we investigate the mechanisms by which three major modes of low‐frequency climate variability—the IPO, AMV, and Southern Ocean SST‐driven midlatitude jet shifts—modulate the South Pacific hydroclimate.
Daniel T. Skinner, Connor Robbins, Gordon N. Inglis, Manoj Joshi, Peter Langdon, Adrian J. Matthews, Mark Peaple, Timothy J. Osborn, David A. Sear   +8 more
wiley   +1 more source

Comparison of evaporation duct height measurement methods and their impact on radar propagation estimates [PDF]

, 1998
A study was performed to compare shipboard measurements of atmospheric parameters that impact the evaporation duct and its effect on the propagation of electromagnetic energy from the AEGIS AN/SPY-1 radars.
Whalen, John David
core   +1 more source

Duct height parameters.

, 2017
Duct height parameters.
Chao Wu (199897), Xin He (48101), Shaobo Yang (1966123), Xingfei Li (1966126), Ying Zhong (286618)   +4 more
core   +1 more source

Research on Nonuniform Ageing State Assessment of Oil‐Immersed Power Transformers Based on PCA–GWO–RF Algorithm

High Voltage, EarlyView.
ABSTRACT The condition assessment of oil–paper insulation is critical for oil–immersed power transformers, which are fundamental to the reliability of modern power systems. The primary limitation of traditional transformer ageing assessment lies in its macroscopic, whole‐unit approach, which fails to account for the localised effects of nonuniform ...
Mingze Zhang, Muhe Yu, Wei Sun, Ji Liu, Song Cheng, Bingjie Wang, Di Shao, Minghe Chi   +7 more
wiley   +1 more source

Spatial and temporal distributions of evaporation ducts in the Black Sea and their impact on the over-the-horizon propagation of electromagnetic waves

Frontiers in Marine Science
The evaporation duct is a critical factor in maritime electromagnetic wave propagation. It exhibits significant spatiotemporal variability influenced by regional meteorological dynamics.
Chongyang Feng, Chongyang Feng, Shuwen Wang, Chunlong Huang, Fan Yang, Yihang Shu, Kunde Yang   +6 more
doaj   +1 more source

Refractivity variations and propagation at Ultra High Frequency

Results in Physics, 2017
Present framework is established to deal with the refractivity variations normally affected the radio waves propagation at different frequencies, ranges and different environments.
I. Alam, M. Najam-Ul-Islam, U. Mujahid, S.A.A. Shah, Rizwan Ul Haq   +4 more
doaj   +1 more source

Effect of meteorological variables on evaporation duct height (EDH): A case study in Basra, Iraq

Journal of Agrometeorology
MUTHANNA A. AL-TAMEEMI, ALI RAHEEM AL-NASSAR, AQEEL GHAZI MUTAR   +2 more
doaj   +2 more sources

Advances in Polymeric Insulating Materials: Global Progress in These 10 Years

High Voltage, EarlyView.
ABSTRACT This journal, High Voltage, celebrates its 10th anniversary in 2026. To commemorate this significant milestone, this comprehensive special review article showcases the latest global research progress and cutting‐edge advancements in polymeric insulating materials, a critical component that underpins high‐voltage systems and is vital to modern ...
Yoshimichi Ohki, George Chen, Davide Fabiani, Reimund Gerhard, Mona Ghassemi, Stanislaw Gubanski, Shengtao Li, Ronald Plath, Roger Schurch, Yuriy Serdyuk, Gilbert Teyssedre   +10 more
wiley   +1 more source

Uncertainty Quantification and Global Sensitivity Analysis for Radio Wave Propagation in Evaporation Duct

Remote Sensing
Accurate prediction of radio wave propagation in evaporation ducts is critical for radar systems but faces significant environmental uncertainties. This study presents an uncertainty quantification and global sensitivity analysis framework comparing ...
Mingjian Li, Liguo Liu
doaj   +1 more source